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ADCMP343ARJ Datasheet(PDF) 1 Page - Analog Devices |
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ADCMP343ARJ Datasheet(HTML) 1 Page - Analog Devices |
1 / 13 page Dual Comparators with 400mV Reference and programmable Hysteresis Preliminary Technical Data ADCMP341/ADCMP343 Rev. PrD Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Low Quiescent Current: 6.5 µA Typ Supply Range: 1.7V to 5.5V 400mV Reference ±0.8% Accuracy Over Temperature Input Range Includes Ground User programmable Hysteresis via resistor string Low Input Bias Current: ±10nA Max Open drain outputs with 40mA Typical Sink Current Supports Wired-AND Connections Input Polarities: ADCMP341 noninverting ADCMP343 inverting Small SOT-23 Package APPLICATIONS Battery-Powered System Monitoring Threshold Detectors Relay Driving Optoisolator Driving Handheld Instruments GENERAL DESCRIPTION The ADCMP341/ADCMP343 combine two low power, low voltage comparators with a 400mV reference in the 5-lead SOT-23 package. Operating within a supply range of 1.7V to 5.5V, the devices only draw 6.5µA typical, making them ideal for low voltage system monitoring and portable applications. Hysteresis is determined using three resistors in a string configuration with the upper and lower tap points connected to the INA_U and INA_L pins of each comparator respectively. The state of the comparators output internally selects which pin is connected to the comparator inputs. So a change of state in the comparator output will result in one of the inputs being switched in to the comparator and the other being switched out. This will provide the user with a fully flexible and simple method of setting the hysteresis. Although there are two pins available on each comparator, there is only actually one input available externally at any one time, the other inputs are connected internally to the reference. The comparator outputs are open drain with the output stage sinking capability guaranteed greater than 5mA over temperature. The ADCMP341 have noninverting inputs and the ADCMP343 have inverting inputs. Available in commercial, industrial and automotive temperature ranges. FUNCTIONAL BLOCK DIAGRAM GND VS OUTA 400mV OUTB VINA INA_U INA_L VINB INB_U INB_L ADCMP341 GND VS OUTA 400mV OUTB VINA INA_U INA_L VINB INB_U INB_L ADCMP343 Figure 1 |
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